RE: Ofeq 9 obs and orbit

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Mon Jul 02 2012 - 13:30:45 UTC

  • Next message: Ted Molczan: "RE: Ofeq 9 obs and orbit"

    Kevin Fetter wrote:
    
    > 36608 10 031A   1775 G 20120702072323392 15 25 2255313-122319 37 S
    > 36608 10 031A   1775 G 20120702072428156 15 25 2051488-123277 37 S
    > 36608 10 031A   1775 G 20120702072449009 15 25 2009020-120548 37 S
    > 
    > Ofeq 9
    > 1 36608U 10031A   12184.29256758 0.00000925  00000-0  50000-4 0    04
    > 2 36608 141.8197  42.7684 0008177 270.0888  89.8942 15.13794860    04
    
    For my analysis, I included both of Kevin's observations from yesterday, with this result:
    
                                                             487 X 552 km
    1 36608U 10031A   12184.29256442  .00002042  00000-0  10000-3 0    03
    2 36608 141.7907  42.2379 0046922 198.4405 161.4656 15.16291825    04
    Arc 20120701.32-0702.31 WRMS resid 0.042 totl 0.033 xtrk
    
    Kevin was not blessed with good reference stars yesterday, so those points have significantly greater residuals than
    today's. Point #1 has much greater residuals than #2, but it is impossible to reliably choose between them, so I
    retained both, but weighted #1 by 30% and #2 by 70%. Subsequent observations will enable refinement. The rate of decay
    is guess.
    
    Ted Molczan
    
    
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